Syringe



(No Model.)

W. w. GUPTI LL. SYRINGE.

No. 441,238. Patented N0v.'Z5, 1890.

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\VINSLOXV \V. GUPTILL, OF BOSTON, ASSIGNOR, BY DIRECT AND MESNE AS- SIGNMENTS, TO CLARENCE V. FOX, OF SAUGUS, MASSACHUSETTS.

SYRINGE.

SPECIFICATION forming part of Letters Patent No. 441,238, dated November 25, 1890.

Application filed February 17, 1890. Serial No. 340,790. (No model.) i

To (tZZ whom it may concern: desired. Each end of the casing B is provided Be it known that LWlNSLOW W. GUPTILL, with a removable head f, having a central a citizen of the United States, residing at Bosopening g, through which the end of the barton,in the countyof Suffolk and State of Masrel projects, the upper head being held in sachusetts, have invented certain Improveplace by the cap cl, which is screwed tightly ments in Syringes, of which the following is ,down thereon, while the lower head is held in .a full, clear, and exact description, reference place by the removable nozzle 6, which is being had to the accompanying drawings, screwed tightly up against it, as seen in Fig. 2. making part of this specification, in which All of the joints are provided with suitable IO Figure 1 is a perspective view of a syringe packing-rings to prevent any possibility of constructed in accordance with my invention. leakage. Fig. 2 is a longitudinal vertical section of the Projecting from the lower end of the barrel same. within the reservoir B is a short tubular My invention consists in a syringe having branch or oifset 71, through which the liquid 15 its barrel surrounded by a tight reservoir or in the reservoir can pass into the barrel A, casing adapted to containa supply of the liqand within this offset is formed a chamber uid to be used, said barrel being provided at containing a self-actinginlet-valve i, which is its lower end with a self-acting inlet-valve adapted to open inward when the piston is communicating with the interior of the reserdrawn up, thereby permitting the liquid to 20 voir, and a self-acting outletor discharge flow throughthe inletapertureainto the bar- 7: valve adapted to close when the inlet-valve rel to charge the same. At the bottom of the is opened, and vice versa, the arrangement of barrel, or within its nozzle, is a chamber is, the valves being such that when the piston is within which is placed a self-acting outlet or drawn up the outlet-valve will be closed and discharge valve Z, opening downward and 25 the inlet-valve opened, thereby allowing the adapted to be drawn up tightly against its liquid to fiow from the reservoir into the barseat when the piston is raised to fill the barrel to fill the same, the downward movement rel. With this arrangement, as the piston is of the piston causing the inlet-valve to close drawn up, the outlet-valve will close and and the outlet-valve to open to permit the the inlet-valvewillbe simultaneously opened, 30 liquid to be discharged through the nozzle, thus permitting the liquid to be drawn thereas hereinafter more particularly set forth. through from the reservoir B into the barrel In the said drawings, A represents the bar- A to fill the same. When, however, the pisrel of the syringe, which is provided, as usual, ton is forced down the inlet-valve will be inwith a piston b and piston-rod c, the latter stantly closed and the outlet-valve opened 5 passing through a cap (I, which is screwed to permit the liquid in the barrel to be disonto the upper end of the barrel A. The charged through the nozzle (2, after which the lower end of the barrel is provided with a reoperation can be repeated as many times as movable nozzle e, which is screwed thereupon, may be desired, until the supply of liquid in as seen in Fig. 2. the reservoir B becomes exhausted, when the 0 B is a leak-tight reservoir or casing, which latter can be refilled through an aperture 0% 9o surrounds the barrel A and is adapted to conin the upper head, which is closed bya screwtain a supply of the liquid to be used in the plug 9. When the piston 19 is forced down syringe. The size of this reservoir may be to the bottom of the barrel, it will fit tightly varied to enable it to contain a quantity of over the inlet-aperture a, and as the piston is 5 the liquid sufficient to recharge the barrel provided with a packing it will tightly close any desired number of times, and said reserthe said inlet-aperture a, and thus effectually voir may be made of cylindrical form, as prevent the liquid in the reservoir B from shown, or of flat, oval, or other desired shape, leaking into the barrel, and thence escaping as taste or fancy may dictate, or to adapt it through the nozzle 6 when the syringe is not 50 to be conveniently carried in the pocket if so in use or is being carried in the pocket. :00

The above-described syringe is of simple construction, has few parts, and can be easily cleansed and kept in order, as the several parts of the syringe can be readily separated from each other.

A syringe constructed as above described will be found particularly well adapted for the use of travelers and others in cases where a vessel into which to pour out the liquid to be used is not always at hand, while when the syringe is employed by veterinary and other surgeons the liability of spilling the solutions or liquids used is entirely avoided, and the operation of administering medicines, &c., greatly facilitated.

I am aware that a syringe susceptible of being charged from the contents of a flask or casing surrounding the barrel is not 'broadly new, the same being shown and described in the United States patent of John L. Dibble, No. 213,978, dated April 8, 1879, and I therefore lay no claim to the construction or any of the devices shown in the aforesaid patent. The syringe shown in the said syringe differs from this in having a second valve arranged to co-0perate with the valve through which the liquid is drawn from the reservoir into the barrel in such a manner as to automatically prevent air from being drawn into the barrel asthe piston is raised, the syringe being consequently at all times in condition for immediate use without the necessity of removing any screw-cap from the nozzle or placing the finger over the end of the latter to exclude the air, which is often inconvenient and liable to be forgotten.

What I'claim as my invention, and desire to secure by Letters Patent, is

A syringe having its barrel surrounded by a tight reservoir or casing adapted to contain a supply of the liquid to be used, said barrel being provided at its lower end with a self-acting inlet-valve communicating with the interior of the reservoir, whereby the barrel may be filled therefrom as the piston is drawn up, and a self-acting outlet or discharge valve adapted to close when the inlet-valve is opened and open when the inletvalve is closed to permit the liquid to be discharged from the nozzle, substantially as described.

WVitness my hand this 12th day of February, A D. 1890.

WVINSLOWV WV. GUPTILL.

In presence of-- P. E. TESCHEMAOHER, HARRY W. AIKEN. 

